阅读说明：本技术 一种后浇带超前止水构造及其施工方法 (Post-cast strip advanced water stop structure and construction method thereof ) 是由 许增科 卢建博 邓若非 文远粦 马培中 王自越 魏志友 齐义忠 王斌 钟振华 于 2019-10-21 设计创作，主要内容包括：本发明公开了一种后浇带超前止水构造及其施工方法,涉及后浇带止水的技术领域,其技术方案的要点是：包括如下步骤：第一步：施工混凝土垫层；第二步,在垫层上铺设防水建材；第三步,在防水卷材上铺设混凝土防水保护层；第四步,施工外贴试橡胶止水带；第五步,绑扎超前止水带钢筋；第六步,填充聚苯板或聚乙烯塑料板；第七步,施工超前止水带；第八步,施工防水油膏嵌缝；第九步,绑扎底板钢筋；第十步,施工底板的混凝土。本发明解决了的技术问题,具有的减少雨水渗入的优点。(The invention discloses a post-cast strip advanced water stop structure and a construction method thereof, relating to the technical field of post-cast strip water stop, and the key points of the technical scheme are as follows: the method comprises the following steps: the first step is as follows: constructing a concrete cushion layer; secondly, paving waterproof building materials on the cushion layer; thirdly, laying a concrete waterproof protective layer on the waterproof roll; fourthly, externally attaching a rubber water stop belt; fifthly, binding leading water stop reinforcing steel bars; sixthly, filling polystyrene boards or polyethylene plastic boards; seventhly, constructing an advanced water stop belt; eighthly, constructing a caulking joint of the waterproof ointment; ninth, binding the reinforcing steel bars of the bottom plate; and tenth, constructing concrete of the bottom plate. The invention solves the technical problem and has the advantage of reducing rainwater infiltration.)

1. A construction method of a post-cast strip advanced water stop structure is characterized by comprising the following steps: the method comprises the following steps:

the first step is as follows: constructing a concrete cushion (1);

secondly, paving waterproof building materials on the cushion layer (1);

thirdly, laying a concrete waterproof protective layer on the waterproof roll (20);

fourthly, externally attaching a rubber water stop belt;

fifthly, binding leading water stop reinforcing steel bars;

sixthly, filling polystyrene boards or polyethylene plastic boards;

seventhly, constructing an advanced water stop belt;

eighthly, constructing a caulking joint of the waterproof ointment;

ninth, binding the reinforcing steel bars of the bottom plate;

and tenth, constructing concrete of the bottom plate.

2. The construction method of the post-cast strip advanced water stop structure according to claim 1, characterized in that: the construction of the cushion layer (1) is carried out by firstly carrying out the operation preparation, and the concrete contents of the operation preparation are as follows: i, base layer treatment: manually cleaning and leveling an original soil layer, erecting a leveling machine when leveling according to an elevation control point during cleaning, and finally tamping; II, setting an elevation control line: determining the elevation of the cushion layer (1) by taking a tower crane as a reference object, arranging elevation control piles on the ground, and leveling by stay wires in catalpus; and III, manufacturing test blocks, carrying out the test block group number according to not less than one group in each construction section, carrying out a group of test blocks every 100m, and carrying out the calculation according to 100m for the full-100 m cultivation.

3. A post-cast strip advance water stop construction according to claim 2, characterized in that: the construction method of the cushion layer (1) comprises the following steps: s1: c10 concrete cushion layer (1) is pasted with cakes on the top surface of the sandy soil cushion layer (1), the bidirectional spacing is about 5.0m, and the cushion layer (1) is directly leveled to the elevation control pile by a level gauge in a local narrow area;

s2: the large-area ground cushion (1) is poured in sections, before concrete is laid, a base layer is sprayed with water to be wet, then the concrete is laid from one end, and the operation is carried out from inside to outside;

s3: before pumping concrete, pumping clear water in a storage hopper out of a pipeline to achieve the purpose of wetting and cleaning the pipeline, then adding cement mortar with the same proportion into a mixing hopper, and starting pumping concrete after lubricating the pipeline (note that one part should not be poured in a concentrated manner and the pouring should be uniformly distributed in the construction process);

s4: after the concrete is pumped out, firstly leveling the concrete in large area according to the attached cement cake, uniformly paving the concrete in a pouring range, wherein the thickness is slightly higher than that of a leveling pile, then vibrating by using a flat plate vibrator, after the concrete is vibrated to be compact, checking the flatness by taking an elevation control pile as a standard, shoveling off the height, compensating the concave position, scraping by using a horizontal wood scraping bar, flattening the surface by using a wood trowel, compacting and leveling the surface layer of the concrete by using the wood trowel when the concrete is about to be initially set, and compacting and leveling the surface layer of the concrete by using the wood trowel when the ground with the gradient requirement is made according to the gradient required by the design,

s5: and (5) maintaining.

4. The construction method of the post-cast strip advanced water stop structure according to claim 1, characterized in that: the construction steps of the waterproof building material are as follows:

a1, unwinding and positioning the coiled material;

a2: uniformly stirring the base layer adhesive, uniformly coating the adhesive on the base layer and the coiled material by using a fluff rolling brush or a hairbrush without balling, ensuring that both surfaces are coated to 100 percent, and avoiding coating the base layer adhesive on the overlapping area of the coiled material; when the base adhesive is dried to be still sticky but not sticky when finger contact is made, the coiled material starts to be paved;

a3: and rolling and paving the half of the coil material coated with the glue and dried on the base layer coated with the glue on the quasi-reference line.

5. The construction method of the post-cast strip advanced water stop structure according to claim 1, characterized in that: the construction method of the waterproof protective layer comprises the following steps: the coiled material of the vertical waterproof layer (2) is paved from bottom to top, and the gluing and glue cooling methods are the same as those of the plane.

6. The construction method of the post-cast strip advanced water stop structure according to claim 1, characterized in that: the construction steps of the rubber waterstop are as follows:

b1: the coiled material is connected with the winding rod in an overlapping manner;

b2: overlapping and positioning adjacent coiled materials, cleaning an overlapping area by using a special cleaning agent, and uniformly brushing an overlapping adhesive;

b3: when the lapping adhesive is dried to be still viscous but is not sticky to touch with fingers, 4mm wide inner sealing paste strips are extruded and coated along the inner edge of the bottom coiled material within 13mm, and the sealing paste is ensured to be uninterrupted on all seams, particularly at the joint of the seams;

b4: after the internal sealing paste is extruded and coated, the coiled material is lapped and bonded at this time, and air is exhausted while pressing with hands, so that the lapped part is bonded without stretching the coiled material or causing the coiled material to be wrinkled, and then, the coiled material is immediately rolled to the outer edge of the seam by a hand-held steel compression roller with positive pressure, so that firm bonding is ensured, and the rolling direction is vertical to the seam direction;

b5: cleaning the joint with cloth stained with matched cleaning agent, extruding and coating lapping sealing paste with the joint as a central line, scraping and compacting the external sealing paste with a special scraper with a groove along the central line of the joint at an angle of 45 degrees to shape the external sealing paste, and applying the lapping sealing paste 2 hours after the lapping is finished, and finishing the lapping within the same day.

7. The construction method of the post-cast strip advanced water stop structure according to claim 6, characterized in that: before the binding of the bottom plate reinforcing steel bars, the double-layer steel wire mesh is laid on the upper surface of the advanced water stop belt to play a role in blocking, so that when concrete at the position of the advanced water stop belt is poured, the inner concrete does not rise and fills the post-pouring belt, and the blocking concrete is bound by the double-layer steel wire mesh on two sides of the post-pouring belt to form a middle post-pouring seam.

8. The utility model provides a post-cast strip advance stagnant water structure which characterized in that: the concrete post-cast concrete waterproof layer comprises a cushion layer (1), a waterproof layer (2) on the cushion layer (1), a polyethylene plastic rod (3), a post-cast strip (6) and concrete on two sides of the post-cast strip (6), wherein the waterproof layer (2) comprises a waterproof coiled material (20) paved on the cushion layer (1) and a fine aggregate concrete protective layer (21).

Technical Field

The invention relates to the technical field of post-cast strip advanced water stop structures, in particular to a post-cast strip advanced water stop structure and a construction method thereof.

Background

The advanced water stop belt can perform subsequent processes of outer wall waterproofing, earthwork backfilling and the like after the foundation is finished. And after the main body is finished, pouring concrete of the post-cast strip. Such a water stop used at the post-cast position and cast prior to the post-cast is called a leading water stop.

In actual construction work, the retention time of the post-cast strip is generally longer. When the building foundation is below the ground water level, the traditional post-cast strip mode is adopted, and the post-cast strip must be cast with concrete after the main structure construction is finished. This requires continuous precipitation during the main body construction process, ensures that groundwater remains below the foundation, and can only be stopped after the main body structure is completed and post-cast strip concrete is poured. This has these drawbacks, firstly, increasing the engineering costs; secondly, the foundation is exposed in the air for a long time, and the outer wall of the foundation is easy to generate expansion cracks due to the existence of day and night temperature difference; thirdly, potential safety hazards exist when the foundation is not filled back immediately after being completed; fourthly, the foundation earthwork is not backfilled to influence the construction of the subsequent process.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to: the utility model provides a post-cast strip advance stagnant water structure, through the regulation to post-cast strip advance stagnant water structure gun body position, can have the advantage of adjusting the launching height.

The technical purpose is realized by the following technical scheme, the post-cast strip advanced water stop structure comprises the following steps:

the first step is as follows: constructing a concrete cushion layer;

secondly, paving waterproof building materials on the cushion layer;

thirdly, laying a concrete waterproof protective layer on the waterproof roll;

fourthly, externally attaching a rubber water stop belt;

fifthly, binding leading water stop reinforcing steel bars;

sixthly, filling polystyrene boards or polyethylene plastic boards;

seventhly, constructing an advanced water stop belt;

eighthly, constructing a caulking joint of the waterproof ointment;

ninth, binding the reinforcing steel bars of the bottom plate;

and tenth, constructing concrete of the bottom plate.

Through above-mentioned technical scheme, lay waterproof building materials on the bed course to and waterproof layer, can reduce the infiltration of water, and then reduce the infiltration of rainwater.

Further, the construction of the cushion layer is firstly carried out with the working preparation, and the concrete content of the working preparation is as follows: i, base layer treatment: manually cleaning and leveling an original soil layer, erecting a leveling machine when leveling according to an elevation control point during cleaning, and finally tamping; II, setting an elevation control line: determining the elevation of a cushion layer by taking a tower crane as a reference object, arranging elevation control piles on the ground, and leveling by catalpus stay wires; and III, manufacturing test blocks, carrying out the test block group number according to not less than one group in each construction section, carrying out a group of test blocks every 100m, and carrying out the calculation according to 100m for the full-100 m cultivation.

Through the technical scheme, the base layer is more smooth through the treatment of the base layer, the upper layer construction is more convenient, and the connection tightness of concrete is improved.

Further, the construction method of the cushion layer comprises the following steps: s1: c10 concrete cushion pad pasting is used on the top surface of the sandy soil cushion, the bidirectional spacing is about 5.0m, and the cushion is directly leveled to the elevation control pile by a level gauge in a local narrow area;

s2: the large-area ground cushion is poured in sections, before concrete is paved, water is sprayed on a base layer for wetting, then paving is carried out from one end, and the operation is carried out from inside to outside;

s3: before pumping concrete, pumping clear water in a storage hopper out of a pipeline to achieve the purpose of wetting and cleaning the pipeline, then adding cement mortar with the same proportion into a mixing hopper, and starting pumping concrete after lubricating the pipeline (note that one part should not be poured in a concentrated manner and the pouring should be uniformly distributed in the construction process);

s4: after the concrete is pumped out, firstly leveling the concrete in large area according to the attached cement cake, uniformly paving the concrete in a pouring range, wherein the thickness is slightly higher than that of a leveling pile, then vibrating by using a flat plate vibrator, after the concrete is vibrated to be compact, checking the flatness by taking an elevation control pile as a standard, shoveling off the height, compensating the concave position, scraping by using a horizontal wood scraping bar, flattening the surface by using a wood trowel, compacting and leveling the surface layer of the concrete by using the wood trowel when the concrete is about to be initially set, and compacting and leveling the surface layer of the concrete by using the wood trowel when the ground with the gradient requirement is made according to the gradient required by the design,

s5: and (5) maintaining.

Through the technical scheme, clear water in the storage hopper is pumped out from the pipeline between the pumping concrete, so that the aim of wetting and cleaning the pipeline is fulfilled.

Further, the construction steps of the waterproof building material are as follows:

a1, unwinding and positioning the coiled material;

a2: uniformly stirring the base layer adhesive, uniformly coating the adhesive on the base layer and the coiled material by using a fluff rolling brush or a hairbrush without balling, ensuring that both surfaces are coated to 100 percent, and avoiding coating the base layer adhesive on the overlapping area of the coiled material; when the base adhesive is dried to be still sticky but not sticky when finger contact is made, the coiled material starts to be paved;

a3: and rolling and paving the half of the coil material coated with the glue and dried on the base layer coated with the glue on the quasi-reference line.

Through above-mentioned technical scheme, the location of coiled material can let the coiled material bond more accurately, reduces cheaply.

Further, the construction method of the waterproof protective layer comprises the following steps: the vertical waterproof layer coiled material is paved from bottom to top, and the gluing and glue cooling methods are the same as those of the plane.

Through above-mentioned technical scheme, can reduce the infiltration of rainwater through the construction of the waterproof layer on the waterproof layer.

Further, the construction steps of the rubber waterstop are as follows:

b1: the coiled material is connected with the winding rod in an overlapping manner;

b2: overlapping and positioning adjacent coiled materials, cleaning an overlapping area by using a special cleaning agent, and uniformly brushing an overlapping adhesive;

b3: when the lapping adhesive is dried to be still viscous but is not sticky to touch with fingers, 4mm wide inner sealing paste strips are extruded and coated along the inner edge of the bottom coiled material within 13mm, and the sealing paste is ensured to be uninterrupted on all seams, particularly at the joint of the seams;

b4: after the internal sealing paste is extruded and coated, the coiled material is lapped and bonded at this time, and air is exhausted while pressing with hands, so that the lapped part is bonded without stretching the coiled material or causing the coiled material to be wrinkled, and then, the coiled material is immediately rolled to the outer edge of the seam by a hand-held steel compression roller with positive pressure, so that firm bonding is ensured, and the rolling direction is vertical to the seam direction;

b5: cleaning the joint with cloth stained with matched cleaning agent, extruding and coating lapping sealing paste with the joint as a central line, scraping and compacting the external sealing paste with a special scraper with a groove along the central line of the joint at an angle of 45 degrees to shape the external sealing paste, and applying the lapping sealing paste 2 hours after the lapping is finished, and finishing the lapping within the same day.

Through above-mentioned technical scheme, the gap between coiled material and the rolling rod can be reduced to the overlap joint mode between coiled material and the rolling rod, and then can reduce the rainwater and permeate from the gap.

Furthermore, before the bottom plate reinforcing steel bars are bound, double-layer steel wire meshes are laid on the upper surface of the position of the advanced water stop to play a role in blocking so as to ensure that when concrete at the position of the advanced water stop is poured, the inner concrete does not rise and fills the post-cast strip, and similarly, the double-layer steel wire meshes are also bound on two sides of the post-cast strip to play a role in blocking concrete so as to form a middle post-cast joint.

Through above-mentioned technical scheme, can, play the separation effect through the reinforcing bar silk screen.

The post-cast strip advanced water stop structure comprises a cushion layer, a waterproof layer on the cushion layer, a polyethylene plastic rod, a post-cast strip and concrete on two sides of the post-cast strip, wherein the waterproof layer comprises a waterproof coiled material and a fine stone concrete protective layer which are paved on the cushion layer.

Through above-mentioned technical scheme, can reduce the infiltration to the rainwater through bed course and waterproof layer, improve structural strength.

In conclusion, the invention has the following technical effects:

1. the setting of bed course, waterproof layer and waterproof building materials and waterproof layer can reduce the infiltration of rainwater and then reduce the structural strength's of rainwater influence.

2. The preparation work of the cushion layer construction is sufficient enough, so that the flatness of the surface of the construction position can be improved, and the influence on the structural strength caused by impurities is reduced;

3. waterproofing membrane's position location can let waterproofing membrane's position more accurate, reduces the deviation of the water-proof effects that offset caused.

Drawings

FIG. 1 is a structural diagram of a post-cast strip advanced water stop structure in an embodiment;

FIG. 2 is a flow chart of a construction method of a post-cast strip advanced water stop structure in the embodiment.

Reference numerals: 1. a cushion layer; 10. bedding concrete; 2. a waterproof layer; 20. waterproof coiled materials; 21. a fine stone concrete protective layer; 3. a polyethylene plastic rod; 4. a concrete structure; 5. a steel wire mesh sheet; 6. post-pouring a belt; 7. a floor bar; 8. and (4) leveling layer.

Detailed Description